Vibration Reduction of Limited Series Nonlinear Energy Sink

In engineering, vibration is ubiquitous. In order to avoid damage caused by vibration to some devices, passive vibration absorbers are usually used for vibration reduction in engineering. The concept of nonlinear energy sink (NES) has been proposed for a long time. However, most previous studies on NES have typically conducted vibration reduction research by coupling a single-degree-of-freedom (1DOF) NES with a single-degree-of-freedom primary system. This paper proposes a vibration control strategy using a limited amplitude series NES. A dynamic model using a limited series NES was established for the two-degree-of-freedom (2DOF) primary system. The influence trend of the parameters of the limited series NES parameters on the vibration control effect was studied through dynamic analysis. The results show that the amplitude-limiting series NES has a better vibration absorption effect and stability than the ordinary series NES under the same mass of the total vibration absorber. This study provides a new and efficient vibration control strategy.